WERA89: Potato Virus and Virus-Like Disease Management

(Multistate Research Coordinating Committee and Information Exchange Group)

Status: Active

WERA89: Potato Virus and Virus-Like Disease Management

Duration: 10/01/2021 to 09/30/2026

Administrative Advisor(s):


NIFA Reps:


Statement of Issues and Justification

Viral pathogens and virus-like pathogens of potato are costly to control, requiring limited generation seed programs and the targeted control of virus vectors, like insects and nematodes, with pesticides and other methods to reduce their spread and minimize their impact. Potato diseases caused by viral pathogens result in hundreds of seed acres and/or their tuber product being rejected from seed certification and also result in commercial losses due to reductions in yield and quality leading to huge financial losses to the producer. Some of the more prevalent viruses of potatoes include alfalfa mosaic virus (AMV), potato mop-top virus (PMTV), tobacco rattle virus (TRV), tomato spotted wilt virus (TSWV), potato leaf roll virus (PLRV), potato virus M (PVM), potato virus S (PVS), potato virus X (PVX) and, most importantly, potato virus Y (PVY) and its various strains. Additionally, the causal agents of purple top disease and zebra chip, which are not viruses but are epidemiologically similar to viruses, have recently become established in the western potato production areas.

Release of new cultivars highly susceptible to PVY, but asymptomatic when infected, has dramatically increased issues with PVY throughout the western potato growing regions. PVY is of particular concern because insecticides have not been effective for reducing PVY spread. Other management options, such as removal of symptomatic plants, are not practical for managing this virus at a large scale. Additionally, multiple strains of PVY have been found to occur throughout the western growing region creating difficulties for disease diagnosis and further exacerbating the efforts to reduce the impact of PVY. Of major concern is the fact that new strains are supplanting the common strain of PVY (PVYO) resulting in milder symptoms on the plants, greater spread throughout the crop, and potentially significant tuber necrosis injury. Some of the newer cultivars which are resistant to the common strain of PVY have been found to be very susceptible to some of the newer strains.

Established and emerging virus strains pose a constant threat to certified seed and commercial potato production. In the last decade, PVA and PVM were not known to occur in the West. PVM seems to have been contained by continued efforts of certification programs, while PVA has become endemic in some regions and absent in others. New strains of PVY, particularly those that produce internal tuber necrosis and reduced yield, were not known in the US prior to the late 1990s but are now commonly found and have become more prevalent in most production areas. Since then, PVY strains have been identified and monitored in the potato-growing regions of the US, and efforts to quantify their impact on the crop and evaluate the performance of new cultivars currently being released from the potato breeding programs have been initiated and continue. In the past, TSWV has been a sporadic problem in the western region but is currently becoming a significant problem in areas where it has become endemic. Finally, soil borne viruses such as PMTV, which is vectored by Spongospora subterranea f. sp. subterranea, and TRV, spread by the stubby root nematode, are serious issues in many western production regions with increasing economic losses due to tuber necrosis and downgrading of raw potatoes. As soil borne viruses increase in prevalence, they are likely to become one of the most significant limitations to potato production that producers will face in the next few years. A large effort in the form of another USDA/ARS Specialty crops grant is currently underway to help understand and develop management techniques for pathogens causing potato tuber necrotic disease. Emerging virus threats are always on the horizon and pose a wider risk to the potato industry as a whole because many more new cultivars are being developed with little information on their reaction to all viruses as well as the industry moving more seed each year from more diverse areas to answer production needs.

There are public and environmental concerns surrounding the use of pesticides on potatoes. Potato growers are faced with the potential loss of key pesticides because of cancellation of registration. In addition, difficulties in developing new information for re-registration or development of new pesticides are becoming more difficult each year. Lastly, pest resistance to current pesticides is always of concern. Pesticides targeting the vectors of some viral pathogens and virus-like pathogens have been useful in the management of diseases like potato leaf roll and zebra chip. Certainly, the loss of pesticides or loss of effectiveness will reduce yield and increase quality losses if alternative solutions for vector management are not developed.

Related, Current and Previous Work

For 2021-2025, a highly collaborative multi-state and multi-institutional project focusing on necrotic viruses was funded by the USDA-NIFA-SCRI program. Goals from this project include the following: 1. To translate high throughput detection of PVY and PMTV in dormant potato tubers, their vectors, and, for PMTV, in soil and potting mix, to plant diagnostic labs; 2. To improve virus-vector management through development of epidemiological models and through research-based recommendations for potato production; 3. To develop molecular markers for resistance genes against PVY and PMTV, and Ss; to clone at least one PVY resistance gene; and to understand virus impacts on the physiology of stored potatoes; and 4. To identify economic, or incentive barriers to effective disease management and to use this information to aid in industry adoption of improved management strategies and harmonized regulations.

In previous years, major efforts were funded by the USDA-SCRI program focused on PVY in 2009-2014 and again from 2015-2019. These efforts resulted in the development of PVY strain typing tools, refinement of methods for PVY detection in tubers (both serological and molecular), new potato cultivars displaying resistance to recombinant PVY strains, and enhanced management of PVY vectors. In addition, multi-state intensive field workshops aimed to train seed potato field inspectors to identify foliar symptoms associated with various virus strain and potato variety interactions were offered at various locations in two separate years.

Since 2013-14, the Northwestern Potato Research Consortium supported the creation of a team of researchers in the PNW. This team includes most of the researchers involved in virus management projects in three states, ID, WA, and OR; it is now expanded to address new, emerging virus problems. Additionally, from 2016 to the present, members of WERA89 successfully leveraged support through several small block grants through the Idaho and Washington departments of agriculture and partnered with researchers across the US in large successful USDA-SCRI grants focused on potato viruses and virus-like diseases.

The continued success since the inception of the WERA89 group highlights the value of a joint, comprehensive approach to address virus problems in the PNW. Members of this team will continue to cooperate on various types of federal grant proposals to be submitted to USDA, NSF, and other programs. The WERA89 group is vital for continued collaboration across multiple states that promotes judicious use of resources, identifies priorities, and coordinates research efforts to solve potato virus and virus-like disease problems.

Objectives

  1. To provide a regional forum for the exchange of ideas through cooperation and collaboration among those involved in potato virus and virus-like disease research for the long-term goal of improving plant health and crop sustainability.
    Comments: Inherent in this is the pursuit of shared grant funding opportunities, where appropriate, by WERA89 participants.
  2. To assist participants in the identification, transfer and utilization of knowledge, methods and resources.
    Comments: Additionally, resources will be directed toward dissemination of information to concerned parties for implementation of potato disease and vector control strategies.
  3. To act in an advisory capacity with regional and national organizations for the purpose of evaluating concerns, recommending policies and reviewing quarantine and seed certification issues, and other matters pertinent to management of potato viruses, or virus-like organisms.

Procedures and Activities

Annual meeting. The WERA89 executive committee will arrange for an annual meeting site where participants can come together to discuss current concerns of virus and virus-like diseases occurring in potato crops. This forum will also include the presentation of on-going research on potato viruses and VLD, their vectors and alternate hosts. In addition, participants will have the opportunity to consider research priorities for the upcoming years.

Committee projects. Subgroups of the participants will be formed to work on specific projects throughout the year including educational materials, presentations, and reference sheets.

Expected Outcomes and Impacts

  • Identification of priority research issues and development of cooperative strategies to obtain funding, conduct the research and publish the results.
  • Identification and characterization of new virus problems, new virus strains and virus-like organisms with dissemination of this information to WERA89 members and the potato industry.
  • Maintain strong relationships with state certification programs and encouraging the standardization of testing methods for potato viruses and phytoplasmas.
  • Cooperation with WERA27 to identify reactions of new clonal selections to specify virus diseases affecting the potato crop in the west.
  • Exchange ideas and information via annual meetings and brief publications specifically directed at interested clientele, and routine communication.
  • Act as a resource group which would provide advice and recommendations to impact policy relating to: a) germplasm importation; b) development of new transgenic potato cultivars; c) utilization of transgenic resistance and germplasm; d) seed certification issues dealing with potato virus diseases; and e) other pertinent potato virus or phytoplasma related issues.

Projected Participation

View Appendix E: Participation

Educational Plan

In the short-term, we plan to extend our findings to the researchers/scientists participating in WERA89 as well as other scientific colleagues with interest in potato virus and virus-like diseases and associated management strategies. Participants in WERA89 regularly interact with these potato researchers throughout the year as part of the active potato research community in the U.S. Through these interactions, results will be disseminated to all U.S. potato researchers at meetings among breeding programs, through meetings of the Potato Association of America (http://potatoassociation.org/), American Phytopathological Society, and via peer reviewed publication.  

Through longer-term interactions with members of the potato production and processing industry, we will transfer information developed by WERA89 participants to the grower community with the goal of increasing the adoption of new farming technologies, cultivars, and disease management strategies.

Effective communication between researchers and producers/processors will lead to more relevant research outcomes and faster adoption of results by stakeholders. 

Various participants have active Web presences through which publications and news can be disseminated. 

We also help plan and participate in major outreach events and field days such as, but not limited to, Washington/Oregon Potato Conference, WSU Potato Field Day, Hermiston Farm Fair, OSU HAREC Potato Field Day, Idaho Potato Conference, ID field day(s) and others.

Various WERA89 participants are highly integrated into the producer-led industry organizations and research-oriented outreach channels. Outcomes of the WERA89 meetings will be efficiently communicated to all who are interested in potato production.

Organization/Governance

The committee will utilize a three-officer system containing a Chair, Vice Chair, Secretary and general membership. Each year a new Secretary shall be elected at the annual meeting. At the end of the annual meeting, the previous year’s Secretary will move into the Vice Chair position and the Vice Chair will move into the Chair position. There will be an effort made to spread the officer duties around the Western Region so that no one state or area will have all of the officer functions at any given time. In addition, a subcommittee will be established each year for the purpose of handling the annual meeting details. Annual meetings will be rotated around the Western Region.

Literature Cited

 

The literature cited is meant to convey the broad scope of publications members of this group have attributed to discussions held at the annual meetings in the previous period. In many cases, the research conducted and shown in this listing was greatly aided by those involved in being able to discuss this work in advance of beginning the project, during its progress, and prior to final publication.

Publications

2020

Binzen Fuller, K., McIntosh, C. and Zidack, N. 2020. Valuing Disease Prevention in a Vegetatively Propagated Annual Crop: Benefits From the Montana Seed Potato Certification Program. Plant Disease 104:2060-2067. https://doi.org/10.1094/PDIS-03-19-0443-SR

Cruzado, R.K., M. Rashidi, N. Olsen, R.G. Novy, E.J. Wenninger, N.A. Bosque-Pérez, A.V. Karasev, W.J. Price, and A. Rashed. 2020. Effect of the level of “Candidatus Liberibacter solanacearum” infection on the development of zebra chip disease in different potato genotypes at harvest and post storage. PLOS One (in press).

Duellman, K.M., Thornton, M.K., and Westra, A.A. Accepted 23 September 2020. Potato seed certification and selection in Idaho. University of Idaho Extension BUL 983.

Duellman, K. 2020. What to know when buying Idaho-certified seed potatoes. Ag Proud Idaho, January 2020 pp. 41-42.

Elison, G.L., D.G. Hall, R.G. Novy, and J.L. Whitworth. 2020. Development and Application of a Multiplex Marker Assay to Detect PVY Resistance Genes in Solanum tuberosum. American Journal of Potato Research.

Fife, A.N., K. Cruzado, R. Novy, A. Rashed, and E.J. Wenninger. 2020. Potato psyllid (Hemiptera: Triozidae) behavior on three potato genotypes with tolerance to ‘Candidatus Liberibacter solanacearum.’ Journal of Insect Science 20(2): 15; 1–10, doi: 10.1093/jisesa/ieaa020.

Fu, Z., A.R. Meier, B. Epstein, A.O. Bergland, C.I. Castillo Carrillo, W.R. Cooper, D.W. Crowder, D.R. Horton, A.S. Jensen, J.L. Kelley, A. Rashed, S.R. Reitz, S.I. Rondon, J. Thinakaran, E.J. Wenninger, C.H. Wohleb, and W.E. Snyder. 2020. Host plants and Wolbachia shape the population genetics of herbivore populations. Evolutionary Applications (in press).

Galimberti, A., A. Alyokhin, H. Qu, and J. Rose. 2020. Simulation modelling of Potato virus Y spread in relation to initial inoculum and vector activity. Journal of Integrative Agriculture 19: 376-388.

Gutiérrez Illán, J., E.H. Bloom, C.H. Wohleb, E.J. Wenninger, S.I. Rondon, A.S. Jensen, W.E. Snyder, and D.W. Crowder. 2020. Landscape structure and climate drive population dynamics of an insect vector within intensely managed agroecoystems. Ecological Applications, https://doi.org/10.1002/eap.2109.

Pandey, B., Mallik, I., and Gudmestad, N.C. (2020) Development and Application of a Real-Time Reverse-Transcription PCR and Droplet Digital PCR Assays for the Direct Detection of Potato mop top virus in Soil. Phytopathology 110:58-67.

Weber, E., Busse, J., & Bethke, P. (2020). Current-season infection with ordinary and recombinant strains of Potato virus Y has detrimental effects on chipping potato yield and tuber quality. Plant Disease, PDIS–06–20–1281–RE. http://doi.org/10.1094/PDIS-06-20-1281-RE

Wenninger, E.J., N. Olsen, J. Lojewski, P. Wharton, J. Dahan, A. Rashed, and A.V. Karasev. 2020. Effects of potato psyllid vector density and time of infection on zebra chip disease development after harvest and during storage. American Journal of Potato Research, https://doi.org/10.1007/s12230-020-09772-6.

Wenninger, E.J., A. Rashed, S.I. Rondon, A. Alyokhin, and J.M. Alvarez. 2020. Insect pests and their management. pp. 283-345. In Potato Production Systems (eds. Stark, J.C., Thornton, M., and Nolte, P.). P. 636. Springer Nature Switzerland.

Westra, A., Nolte, P., Whitworth, J.L., Durrin, J. 2020. Seed potato production and certification. Pages 65-86 in: Potato Production Systems. J. C. Stark, Thornton, M., Nolte, P., ed. Springer Nature Switzerland AG 2020, Switzerland.

Zhai, Y., Mallik, I., Hamid, A., Tabassum, A., Gudmestad, N., Gray, S.M., and Pappu, H.R. (2020) Genetic diversity in potato mop-top virus populations in the United States and a global analysis of the PMTV genome. Eur. J. Plant Pathol. 156:333-342.

2019

Babujee, L., Witherell, R.A., Mikami, K., Aiuchi, D., Charkowski, A.O., and Rakotondrafara, A.M. (2019) Optimization of an isothermal recombinase polymerase amplification method for real-time detection of Potato virus Y O and N types in potato. Journal of Virological Methods. 267: 16-21.

Chikh-Ali, M., Rodriguez-Rodriguez, M., Green, K.J., Kim, D.-J., Chung, S.-M., Kuhl, J.C, and Karasev, A.V. (2019) Identification and molecular characterization of recombinant Potato virus Y (PVY) in potato from Korea, PVYNTN strain. Plant Disease 103: 137-142 (http://dx.doi.org/10.1094/PDIS-05-18-0715-RE).

Cooper, W.R., Horton, D.R., Thinakaran, J., and Karasev, A.V. (2019) Dispersal of Bactericera cockerelli (Hemiptera: Triozidae) in relation to phenology of matrimony vine (Lycium spp.; Solanaceae). Journal of the Entomological Society of British Columbia 116: 25-39.

Cornejo-Franco, J.F., Alvarez-Quinto, R.A., Mollov, D., Karasev, A.V., Ochoa, J., and Quito-Avila, D.F. (2019) A new tymovirus isolated from Solanum quitoense: characterization and prevalence in two solanaceous crops in Ecuador. Plant Disease 103: 2246-2251 (http://dx.doi.org/10.1094/PDIS-01-19-0113-RE).

Dahan, J., Wenninger, E.J., Thompson, B.D., Eid, S., Olsen, N., and Karasev, A.V. (2019) Prevalence of ‘Candidatus Liberibacter solanacearum’ haplotypes in potato tubers and psyllid vectors in Idaho from 2012 to 2018. Plant Disease 103: 2587-2591 (http://dx.doi.org/10.1094/PDIS-11-18-2113-RE).

Duellman, K., Olsen, N., Hutchinson, P.J.S., and Woodhall, J. 2019. Now is the time to destroy cull potatoes. Potato Grower, published online May 14, 2019 https://www.potatogrower.com/2019/05/now-is-the-time-to

Duellman, K., Olsen, N., Hutchinson, P.J.S., and Woodhall, J. 2019. Cull potato management. Treasure Valley Pest Alert network, published online May 13, 2019 http://pnwpestalert.net/alerts/search/cull%20potato

Duellman, K., and Karasev, A. 2019. Healthy Start: Does cutting seed potato tubers spread PVY from infected tubers to healthy ones? Potato Grower, May Issue.

Fulladolsa, A.C., Charkowski, A., Cai, X., Whitworth, J, Gray, S., and Jansky, S. (2019) Germplasm with resistance to Potato virus Y derived from Solanum chacoense: Clones M19 (39-7) and M20 (XD3). American Journal of Potato Research, published on-line March 15, 2019 (https://link.springer.com/article/10.1007/s12230-019-09719-6).

Gundersen, B., Inglis, D.A., Pavek, M.J., and Karasev, A.V. (2019) Foliar and tuber reactions of three strains of Potato virus Y on five fresh market potato cultivars through three successive potato generations. American Journal of Potato Research 96: 519-531 (http://dx.doi.org/10.1007/s12230-019-09738-3).

Huang, D., G. Yan, N.C. Gudmestad, and J. Whitworth. 2019. Assessment of Factors Associated with Molecular Quantification of Stubby Root Nematode Paratrichodorus allius from Field Soil DNA. Plant Disease 103:3265-3273.

Huang, D., Yan, G. P., Gudmestad, N., Ye, W., Whitworth, J., Frost, K., Crow, W., and Hajihassani, A. (2019) Developing a one-step multiplex PCR assay for rapid detection of four stubby-root nematode species Paratrichodorus allius, P. minor, P. pororus and Trichorodorus obtusus. Plant Disease. 103: 404-410.

Inglis, D.A., Gundersen, B., Beissinger, A., Benedict, C., and Karasev, A.V. (2019) Potato virus Y in seed potatoes sold at garden stores in western Washington: prevalence and strain composition. American Journal of Potato Research 96: 235-243 (http://dx.doi.org/10.1007/s12230-018-09695-3). 

Miglino, R., Kappagantu, M., van der Vlies, P., de Haas, J., Boomsma, D. and Pappu, H.R. (2019) Comparative transcriptome analysis of potato cultivars in response to Tobacco rattle virus infection. EAPR Plant Virology meeting. Estonia. June 25-28, 2019.

Nalam, V., Louise, J., and Shah, J. (2019) Plant defenses against aphids, the pest extraordinaire. Plant Science. 279: 96-107.

Pinheiro, P.V., Wilson, J.R., Xu, Y., Zheng, Yi, Rebelo, A.R., Fattah-Hosseini, S., Kruse, A., Santos Dos Silva, Xu, Y., Kramer, M., Giovannoni, J., Fei, Z., Gray, S. and Heck, M., (2019). Plant viruses transmitted in two different modes produce differing effects on small RAN-mediated processes in their aphid vector. Phytobiomes. Online 20 March 2019, https://doi.org/10.1094/PBIOMES-10-18-0045-R

Rosenman, J., Christopher S. McIntosh, Giri Raj Aryal, Phil Nolte. (2019) “Planting a Problem – Examining the Spread of Seed-Borne Potato Virus Y” Plant Disease, Vol. 103 No. 9: https://doi.org/10.1094/PDIS-11-18-2004-SR.

Vologin, S.G., Zamalieva, F.F., Stasevski, Z., and Karasev, A.V. (2019) Occurrence of alfalfa mosaic virus in potato (Solanum tuberosum L.) in Middle Volga region of Russia. Plant Disease 103: 3289 (http://dx.doi.org/10.1094/PDIS-03-19-0662-PDN).

Wenninger, E.J., Dahan, J., Thornton, M., and Karasev, A.V. (2019) Associations of the potato psyllid and “Candidatus Liberibacter solanacearum” in Idaho with the non-crop host plants bittersweet nightshade and field bindweed. Environmental Entomology 48: in press (https://doi.org/10.1093/ee/nvz033).

Zeng, Y., Fulladolsa, A.C., Houser, A., and Charkowski, A.O. (2019) Colorado seed potato certification data analysis shows mosaic and blackleg are major disease of seed potato and identifies tolerant potato varieties. Plant Disease. 103: 192-199.

2018

Beissinger, A. and Inglis, D. March 2018. Greenhouse comparison of two detection methods for Potato virus YN-Wi at four potato growth stages. Plant Health Progress (19):71-75.

Beissinger, A., Benedict, C., and Inglis, D. 2018. Alternative sources of Potato virus Y in western Washington. WSU Extension Technical Bulletin: 49E. x p. (in press).

Bertram, M.C., Lent, M.A., Rashed, A., and Duellman, K.M. 2018. Efficacy of combined crop oil and insecticide applications on in-season movement of PVY in southeast Idaho. 102nd Annual Meeting of the Potato Association of America, Boise ID. Am J Potato Res. 96:319 (Abstract).

Couture J. J., Singh A., Charkowski A. O., Groves, R. L., Gray, S. M., Bethke, P. C., Townsend, P. A. 2018. Integrating spectroscopy with potato disease management. Plant Disease 102:2233-2240. https://doi.org/10.1094/PDIS-01-18-0054-RE.

DeBlasio, S.L., Rebelo, A.R., Parks, K., Gray, S.M. and Heck, M.C. (2018) Disruption of chloroplast function through downregulation of phytoene desaturase enhances the systemic accumulation of an aphid-borne, phloem limited virus. Molecular Plant-Microbe Interactions. 31: 1095-1110.

DeBlasio, S.L., Xu, Y., Johnson, R.S., Rebelo, A.R., MacCoss, M.J., Gray, S.M., and Heck, M. (2018) The interaction dynamics of two Potato leafroll virus movement proteins affects their localization to the outer membranes of mitochondria and plastids. Viruses. 10: 1-26.

Duellman, K.M. and Marshall, J.M. 2018. Importance of Potato Volunteers as PVY Reservoirs in Idaho, 2018. 102nd Annual Meeting of the Potato Association of America, Boise ID (Abstract)

Duellman, K., and Wenninger, E. 2018. Aphids, mineral oils, and minimizing in-season spread of PVY in seed potatoes. Spudman (8)56:40-41.

Duellman, K., Gray. S., and Westra A. 2018. Casting a wide net: Minimizing in-season spread of PVY. Potato Grower, April Issue.

Dwyer, J., Dwyer, M., Alyokhin, A., Dill, J., Buzza, A. 2018. Aphid Tower Trapping Results in Maine. 9th International IPM Symposium. Baltimore, Maryland (abstract)

Dwyer, James, D., Dwyer, Marc. J. 2018. What We Have Learned About Aphids in the Last Five Years. Maine Potato Conference January 17 and 18, 2018. University of Maine at Presque Isle (abstract)

Fulladolsa, A.C., La Plant, K.E., Groves, R.L., Charkowski, A. 2018. Potato plants grown from minitubers are delayed in maturity, but are not more susceptible to Potato virus Y than plants grown from conventional seed. American Journal of Potato Research 95 (1): 45-53.

Gray, S.M., and Power, A.G. 2018. Anthropogenic influences on emergence of vector-borne plant viruses: the persistent problem of Potato virus Y. Current Opinion in Virology. 33: 177-183.

Green, K.J., Brown, C.J., and Karasev, A.V. (2018) Genetic diversity of Potato virus Y (PVY): sequence analyses reveal ten novel PVY recombinant structures. Archives of Virology 163: 23-32.

Huang, D., Yan, G. P., Gudmestad, N., Whitworth, J., Frost, K., Brown, C., Weimin, Y., Agudelo, P., and Crow, W. (2018) Molecular characterization and identification of stubby root nematode species from multiple states in the United States. Plant Disease. 102: 2101-2111.

Inglis, D., Benedict, C., Gundersen, B., Beissinger, A., and McMoran, D. 2018. Proactive approaches for controlling recombinant strains of Potato virus Y in western Washington. WSU Extension Technical Bulletin FS313E.

McMoran, D.W., Benedict, C.A., and Inglis, D.A. 2018. Potato virus Y and organic potatoes in western Washington. WSU Extension Fact Sheet FS312E.

Price, W.J., E.J. Wenninger, and B. Shafii. 2018. Modeling potato psyllid occurrence using sticky trap data for the management of zebra chip disease. Conference on Applied Statistics in Agriculture, 29th Annual Conference Proceedings. Kansas State University Libraries, New Prairie Press. https://doi.org/10.4148/2475-7772.1522

Rondon, S., A. Schreiber, P. Hamm, N. Olsen, E. Wenninger, C. Wohleb, T. Waters, and R. Cooper. 2018. Potato psyllid vector of zebra chip disease in the Pacific Northwest: biology, ecology, and management. PNW 633.

Shakir, N., Hameed, S., Karasev, A.V., and Zafar, Y. (2018) Occurrence of Potato virus Y (PVY) recombinants, strain PVYNTN, infecting tobacco in Pakistan. Plant Disease 102: 2385-2385.

Stark, J.C., R.G. Novy, J.L. Whitworth, N.R. Knowles, M.J. Pavek, M. Thornton, C.R. Brown, B.A. Charlton, V. Sathuvalli, T.L. Brandt, N. Olsen, and S. Yilma. 2018. Pomerelle Russet: an Early Maturing Potato Variety with High Yields of U.S. No. 1 Tubers Suitable for Fresh Market and mid-Storage Processing and Tolerance to Potato Mop-top Virus. American Journal of Potato Research 95:110-122.

Xu, Y., Da Silva, W.L, Qian, Y., and Gray, S.M. (2018) An aromatic amino acid and associated helix in the C-terminus of the potato leafroll virus minor capsid protein regulate systemic infection and symptom expression. PLoS Pathogens. 14: e1007451.

Yellareddygari, S.K.R., J.L. Whitworth, and N.C. Gudmestad. 2018. Assessing Potato Cultivar Sensitivity to Tuber Necrosis Caused by Potato mop-top virus. Plant Disease 102:1148-1153.

Yellareddygari, S.K.R., C. Brown, J.L. Whitworth, R. Quick, L.L. Hamlin, and N.C. Gudmestad. 2018. Assessing potato cultivar sensitivity to tuber necrosis caused by Tobacco rattle virus. Plant Disease 102:1376-1385.

Zeng, Y., Fulladosa, A. C., Houser, A., Charkowski, A. O. 2018. Colorado seed potato certification data analysis shows mosaic and blackleg are major diseases of seed potato and identifies tolerant potato varieties. Plant Disease. (near submission)

2017

Beissinger, A., Goldberger, J.R., Benedict, C.A., and Inglis, D.A. 2017. Seed potatoes, virus management, and the non-   adoption of an agricultural innovation. Rural Sociology: doi:10.1111/ruso.12181.

Charkowski, A. O. 2017. The socioeconomic impact of emerging and re-emerging disease epidemics. Phytopathology 107 (12):161

Dahan, J., E.J. Wenninger, B. Thompson, S. Eid, N. Olsen, and A.V. Karasev. 2017. Relative abundance of potato psyllid haplotypes in potato fields in Southern Idaho during 2012 to 2015, and incidence of “Candidatus Liberibacter solanacearum” causing zebra chip disease. Plant Disease 101:822-829.

Elwan, E.A., Abdel Aleem, E.E., Fattouh, F.A., Green, K.J., Tran, L.T., and Karasev, A.V. 2017. Occurrence of diverse recombinant strains of Potato virus Y circulating in potato fields in Egypt. Plant Disease, published on-line April 17, 2017

Fulladolsa, A. C., Jansky, S. H., Smith, D. R., Abramczak, C. M., Charkowski, A. O. 2017. Development and evaluation of four molecular markers tightly linked to the Potato virus Y resistance gene Ry(chc) in diploid potato populations. Phytopathology 107 (12): 69 (abstract)

Funke, C.N., Nikolaeva, O.V., Green, K.J., Tran, L.T., Chikh-Ali, M., Quintero-Ferrer, A., Cating, R., Frost, K.E., Hamm, P.B., Olsen, N., Pavek, M.J., GFray, S.M., Crosslin, J.M., and Karasev, A.V. 2017. Strain-specific resistance to Potato virus Y (PVY) in potato and its effect on the relative abundance of PVY strains in commercial potato fields. Plant Disease 101: 20-28

Green, K.J., Brown, C.J., Gray, S.M., and Karasev, A.V. 2017. Phylogenetic study of recombinant strains of Potato virus Y. Virology 507: 40-52.

Huang, D., Yan, G. P., and Skantar, A. M. 2017. Development of real-time and conventional PCR assays for identifying stubby root nematode Paratrichodorus allius. Plant Disease 101:964-972.

Huang, D., Yan, G. P., and Skantar, A. M. 2017. Quantification of Paratrichodorus allius in DNA extracted from soil using TaqMan Probe and SYBR Green real-time PCR assays. Nematology 19: 987-1001.

Huang, D., Yan, G. P., Plaisance, A., Gudmestad, N. C., Whitworth, J., Frost, K., Brown, C. R., Hafez, S. L., Handoo, Z. A., and Skantar, A. M. 2017. Molecular detection, identification and quantification of Paratrichodorus allius from nematode individuals, communities and soil DNA. Abstracts of 56th Annual Meeting of the Society of Nematologists, Williamsburg, Virginia, August 13-16. (abstract)

Inglis, D.A., Gundersen, B., Beissinger, A., and Karasev, A.V. 2017. Foliar and tuber reactions of five fresh market potato cultivars with three Potato virus Y strains. Ann. Mtg. Amer. Phytopath. Soc., S10x:xxx, San Antonio, TX (abstract for poster presentation).

Kinzer, K. and Westra, A. 2017. Shopping List: Seed Potato Purchasing Guidelines. Potato Grower, January Issue

Mondal, S. and Gray, S.M. 2017. Sequential acquisition of Potato virus Y strains by Myzus persicae favors the transmission of the emerging recombinant strains. Virus Research 241:116-124.

Mondal, S., E.J. Wenninger, P.J.S. Hutchinson, J.L. Whitworth, D. Shrestha, S.D. Eigenbrode, N.A. Bosque-Pérez, and W.E. Snyder. 2017. Responses of Aphid Vectors of Potato leaf roll virus to Potato Varieties. Plant Disease 101:1812-1818.

Mondal, S., Lin, Y.H., Carroll, J.E., Wenninger, E.J., Bosque-Perez, N.A., Whitworth, J.L., Hutchinson, P., Eigenbrode, S., Gray, S.M. 2017. Potato virus Y transmission efficiency from potato infected with single or multiple virus strains. Phytopathology 107:491-498.

Novy, RG, Whitworth, JL, Stark, JC, Schneider, BL, Knowles, NR, Pavek, MJ, Knowles, LO, Charlton, BA, Sathuvalli, V, Yilma, S, Brown, CR, Thornton, M, Brandt, TL, Olsen, N.  2017.  Payette Russet: a Dual-Purpose Potato Cultivar with Cold-Sweetening Resistance, Low Acrylamide Formation, and Resistance to Late Blight and Potato Virus Y.  Am. J. Potato Research.  94:38-53.

Wenninger, E.J., A. Carroll, J. Dahan, A.V. Karasev, M. Thornton, J. Miller, P. Nolte, N. Olsen, and W. Price. 2017. Phenology of the potato psyllid, Bactericera cockerelli (Hemiptera: Triozidae), and “Candidatus Liberibacter solanacearum” in commercial potato fields in Idaho. Environmental Entomology 46: 1179-1188.

Westra, A. and Kinzer, K. 2017. What it all means: Interpreting post-harvest test results. Potato Grower, February Issue

Yan, G. P., Huang, D., Plaisance, A., Gudmestad, N. C., Whitworth, J., Frost, K., Brown, C. R., Ye, W., Crow, B., and Hafez, S. L. 2017. Species and population densities of stubby root nematodes from multiple states in the United States. Phytopathology 107:S5.96 (abstract).

Yellareddygari, S.K.R., Domfeh, O. Bittara, F.G., and Gudmestad, N.C. 2017. Analysis of Potato Mop-Top Virus survival probability in post-harvest storage. Amer. J. Potato Res. 94:632-637.

Zidack, N., Gray, S. Ugly Fight: Battling Tuber Necrotic Viruses. Potato Grower, May 2017. 

2016

Alyokhin, A. and A. Buzza. 2016. Epidemiology of Potato Virus Y in Northern Maine. Northeastern Plant, Pest, and Soils Conference, Philadelphia, PA. January 3-7, 2016. (abstract)

Bag, S., Frost, K., Rondon, S.I., Charlton, B.A., and D. Walenta. 2016. Variation in aphid abundance and Potato virus Y incidence in Oregon potato. APS Annual Meeting. July 30- Aug 3, Tampa, FL. Phytopathology 106 (Suppl. 4) S4.44 (abstract)

Bag, S., Rondon, S., Frost, K., Walenta, D. and B. Charlton. 2016. Monitoring aphids and potato virus Y in seed and commercial fields in Oregon. XXV International Congress of Entomology, September 25-30, Orlando, FL, USA. (abstract)

Bag, S., S.I. Rondon, K. Frost, D. Walenta, and B. Charlton. 2016. Monitoring aphids in seed and commercial potato fields in Oregon. In 75th annual Pacific Northwest Insect Management Conference. Jan 11-12. Portland, OR. Section V. Pp 59-62. (abstract)

Beissinger, A. 2016. Proactive approaches for managing Potato virus Y in western Washington. M.S. Thesis, WSU Plant Pathology Department, Pullman, WA (136 pages).

Beissinger, A., Benedict, C.A., Goldberger, J., and Inglis, D.A. 2016. A sociological assessment of Potato virus Y in western Washington: Barriers and bridges to adopting new management practices. Ann. Mtg. Amer. Phytopath. Soc., S106:S4.119. July 30- Aug 3, Tampa, FL (abstract and poster presentation).

Carroll, J.E., Smith, D.M., and Gray, S. M. 2016. Preferential acquisition and inoculation of PVYNTN over PVYO in potato by the green peach aphid Myzus persicae (Sulzer). J. Gen. Virol. 97: 797–802.

Chikh-Ali, M., *Alruwaili, H., **Vander Pol, D., and Karasev, A.V. (2016) Molecular characterization of recombinant strains of Potato virus Y from Saudi Arabia. Plant Disease 100: 292-297.

Chikh-Ali, M., Bosque-Perez, N., **Vander Pol, D., Sembel, D., and Karasev, A.V. (2016) Occurrence and molecular characterization of recombinant Potato virus YNTN (PVYNTN) isolates from Sulawesi, Indonesia. Plant Disease 100: 269-275.

Chikh-Ali, M., Vander Pol, D., Nikolaeva, O.V., Melzer, M.J., and Karasev, A.V. 2016. Biological and molecular characterization of a tomato isolate of Potato virus Y (PVY) of the PVYC lineage. Archives of Virology 161: 3561–3566.

Domfeh, O. and Gudmestad, N.C. 2016. Effect of soil moisture on the development of Potato Mop Top virus-induced tuber necrosis. Plant Dis. 100:418-423.

Domfeh, O. and Gudmestad, N.C. 2016. Moisture management as a potential disease control strategy for Potato Mop Top virus-induced tuber necrosis. Plant Dis. 100:418-423.

Fulladolsa, A. Jansky, S., Halterman, D., Charkowski, A. 2016. Development of molecular markers tightly linked to Potato virus Y resistance gene Rychc in a diploid potato population. Phytopathology 106:14 (abstract)

Funke, C., Frost, K., Olsen, N., and A.V. Karasev. 2016. Strain specific resistance to Potato virus Y (PVY) in potato efficiently reduces the prevalence of the PVYO strain under semi-field conditions. Phytoplathology 106 (Suppl. 4) S4.199.

Groves, R.L., Frost, K.E., and A. Charkowski. 2016. Grower-driven data reveals first principles in the management of Potato virus Y incidence in seed potato production. XXV International Congress of Entomology, Orlando, FL, September 25-30. DOI: 10.1603/ICE.2016.93731 (conference paper)

Huang, D. and Yan, G. P. 2016. Real-time and conventional PCR assays for identifying the stubby root nematode Paratrichodorus allius. American Phytopathological Society Annual Meeting, Tampa, FL, July 30-August 3, 2016. (abstract)

Inglis, D.A. 2016. ‘Cracked’ potato tubers and Potato virus Y. Invited PAA Forum article, Spudman magazine, June 2016.

Inglis, D.A., Gundersen, B., and Beissinger, A. 2016. Evidence that tuber cracking in potato can be caused by Potato virus Y. Ann. Mtg. Pacific Div. Amer. Phytopathol. Soc. 106:S4.199, La Conner, WA (abstract and poster presentation).

Karasev, A. 2016. Characterization of recombinant Potato virus YNTN (PVYNTN) isolates from Sulawesi, Indonesia. 108th Annual Meeting of the American Phytopathological Society, July 30 - August 3, 2016, Tampa, FL (abstract and poster presentation).

Kaur, N., Cating, R.A., Dung, J.K.S., Frost, K.E., Robinson, B.A., and P.B. Hamm. 2016. First report of Potato mop-top virus infecting potato in Oregon. Plant Disease 100:2337.

Klein, M.L. and S.I. Rondon. 2016. Spatial and temporal analysis of aphids in eastern Oregon. In 75th annual Pacific Northwest Insect Management Conference. 11-12 Jan. Portland, OR. Section V. Pp 62-64. (abstract)

Kuhl, J.C., R.G. Novy, J.L. Whitworth, M.S. Dibble, B. Schneider, and D. Hall. 2016. Development of Molecular Markers Closely Linked to the Potato Leafroll Virus Resistance Gene, Rlr etb, for use in Marker-Assisted Selection. American Journal of Potato Research 93:203-212.

Mondal, S., E.J. Wenninger, P.J.S. Hutchinson, J.L. Whitworth, D. Shrestha, S.D. Eigenbrode, and N.A. Bosque-Perez. 2016. Comparison of transmission efficiency of various isolates of Potato virus Y among three aphid vectors. Entomologia Experimentalis et Applicata 158:258-268.

Novy, R., J. Whitworth, J. Stark. 2016. Breeding for resistance to Potato virus Y and protocols to mitigate PVY in breeder seed.  American Journal of Potato Research 94:237

Raikhy, G., N. Gudmestad, S.M. Gray, and H.R. Pappu. 2016. Genetic diversity of Tobacco rattle virus isolates in the US.  Paper presented at the 16th triennial meeting of the Virology Section of the European Association of Potato Research. May 31st to June 3rd 2016. (abstract)

Rondon. S.I., Bag, S., Vinchesi, A., Goyer, A. and K. Frost. 2016. PVY vectors, vector-plant interactions and novel control methods in the western United States. 16th triennial meeting of the virology section of the European Association of Potato Research, May 31 – June 3, Ljubljana, Slovenia. (abstract)

Sathuvalli, V., C.R. Brown, S. Yilma, B.A. Charlton, C.C. Shock, R. Quick, E. Feibert, J.L. Whitworth, R.G. Novy, J.C. Stark, M.J. Pavek, N.R. Knowles, R.A. Navarre, J. Debons, and M.I. Vales. 2016. Yukon Nugget: a Mid-Season Yellow Skin, Yellow Flesh Specialty Potato with Extreme Resistance to Potato Virus X. American Journal of Potato Research 93:602-608.

Thomas-Sharma, S., Abdurahman, A., Ali, S., Andrade-Piedra, J. L., Bao, S., Charkowski, A. O., Crook, D., Kadian, M., Kromann, P., Struik, P. C., Torrance, L., Garrett, K.A., Forbes, G.A. 2016. Seed degeneration in potato: the need for an integrated seed health strategy to mitigate the problem in developing countries. Plant Pathology 65 (1):3-16.

Whitworth, Jonathan. 2016.  Potato virus Y is an industry-wide problem; challenges in removing PVY from seed.  American Journal of Potato Research 94:248

Yan, G. P., Plaisance, A., Huang, D., and Handoo, Z. A. 2016. First detection of the stubby root nematode Paratrichodorus allius on potato in North Dakota and on sugarbeet in Minnesota. American Phytopathological Society Annual Meeting, Tampa, FL, July 30-August 3, 2016. (abstract)

Yan, G. P., Plaisance, A., Huang, D., Upadhaya, A., Gudmestad, N. C., and Handoo, Z. A. 2016. First report of the stubby root nematode Paratrichodorus allius on potato in North Dakota. Plant Disease 100: 1247. http://dx.doi.org/10.1094/PDIS-11-15-1350-PDN.

2015

Alyokhin, A. 2015.  Preventing the Spread of Potato Viruses: What Insecticides Can and Cannot Do. Webinar presented for the Pest Management Network, available at http://www.plantmanagementnetwork.org/edcenter/seminars/potato/PotatoViruses/

Alyokhin, A. 2015. Con- and heterospecific influences on potato colonization by three species of aphids. Annual Meeting of the Entomological Society of America, Minneapolis, MN. November 15-18, 2015. (abstract)

Alyokhin, A. 2015. Managing non-persistently transmitted aphid-borne viruses: Perceptions and reality. Symposium “Beyond Corn and Soybeans...Challenges to Integrated Pest Management in Specialty Crops.” Annual Meeting of the Entomological Society of America, Minneapolis, MN. November 15-18, 2015. (abstract)

Benedict, C., McMoran, D., Inglis, D., and Karasev, A.V. 2015. Tuber symptoms associated with recombinant strains of Potato virus Y in specialty potatoes under northwestern Washington growing conditions. Amer. J. of Potato Res. 92: 593-602.

Cating, R. A., C.N. Funke, N. Kaur, P.B. Hamm, and K.E. Frost, 2015. A multiplex reverse transcription (RT) high-fidelity PCR protocol for the simultaneous detection of six viruses that cause potato tuber necrosis. American Journal of Potato Research 92:536-540.

Chikh-Ali, M., Alruwaili, H., Vander Pol, D., and Karasev, A.V. 2015. Molecular characterization of recombinant strains of Potato virus Y from Saudi Arabia. Plant Disease 100: 292-297.

Chikh-Ali, M., Bosque-Perez, N., Vander Pol, D., Sembel, D., and Karasev, A.V. 2015. Occurrence and molecular characterization of recombinant Potato virus YNTN (PVYNTN) isolates from Sulawesi, Indonesia. Plant Disease 100: 269-275.

Chikh-Ali, M., Naidu, R., and Karasev, A.V. 2015. First report of Potato virus Y (PVY) strain PVYC associated with a tomato disease in Kenya. Plant Disease 100:864.

Couture, J. J. 2015. Mapping variation in vegetation functioning using imaging spectroscopy (Invited), American Geophysical Union (AGU) Fall Meeting. Dec. 18, 2015. (abstract)

DeBlasio, S.L., Johnson, R., Mahoney, J., Karasev, A.V., Gray, S.M., MacCoss, M.J., and Cilia, M. 2015. Insights into the polerovirus-plant interactome revealed by co-immunoprecipitation and mass spectrometry. Molecular Plant-Microbe Interactions 28: 467-481.

DeBlasio, S.L., Johnson, R., Sweeney, M.M., Karasev, A.V., Gray, S.M., MacCoss, M.J., and Cilia, M. (2015) The Potato leafroll virus structural proteins manipulate overlapping, yet distinct protein interaction networks during infection. Proteomics 15: 2098-2112.

Domfeh, O., Bittara, F., and Gudmestad, N.C. 2015. Sensitivity of potato cultivars to Potato Mop Top virus-induced tuber necrosis. Plant Dis. 99:788-796.

Domfeh, O., Thompson, A.L. and Gudmestad, N.C. 2015. Sensitivity to tuber necrosis caused by Potato Mop Top virus in advanced potato (Solanum tuberosum L.) breeding selections. Amer. J. Potato Res. 92:636-647.

Dwyer, J. D. 2015. When is the Best Time to Initiate PVY/Aphid Management Strategies.  Spudlines, Volume 50 Number 3.  

Frost, K.E., Gevens, A.J. and Groves, R.L.  2015.  Web-based pest and disease forecasting tool for enhanced processing vegetable crop management. In Proceedings of the 2015 Wisconsin Crop Management Conference Abstracts, January, 13-15, Alliant Energy Center, Madison, WI. (abstract)

Fulladolsa Palma, Ana Cristina. 2015. Management of Potato virus Y in potato. PhD diss., University of Wisconsin-Madison.

Fulladolsa, A. C., F. M. Navarro, R. Kota, K. Severson, J. P. Palta, and A. O. Charkowski. 2015. Application of marker assisted selection for Potato virus Y resistance in the University of Wisconsin Potato Breeding Program. American Journal of Potato Research 92 (3): 444-450.

Groves, R.L. Charkowski, A.O. and Bethke, P.  2015.  Influence of viral stresses on potato storage quality.  In Proceedings of the 2015 University of Wisconsin - Wisconsin Potato and Vegetable Growers, Grower Education Conference , UW- Madison College of Agriculture and Life Sciences, Research Division and UWEX, Feb. 3-5, Steven’s Point, WI, 22:1pp. (abstract)

Groves, R.L., Frost, K.E. and Huseth, A.S.  2015.  Modeling Potato virus Y incidence in seed potato production using grower-driven data and landscape analyses. In Proceedings of the 2015 AFRI NIFA Sponsored Workshop: Enhancing Risk Index-Driven Decision Tools for Managing Insect Transmitted Plant Pathogens, Conference Abstracts, May 14-16, Asilomar Conference Grounds, Pacific Grove, CA. (http://ucanr.edu/sites/tospo/). (abstract)

Groves, R.L., Frost, K.E., Charkowski, A.O., Duerr, E., Huseth, A.S. and Crockford, A.B. 2015. Data Driven IPM: Accurate Predictions of Risk for Plant Protection. P-IE Section Symposium, Insecticide Resistance Management (IRM) vs. Integrated Pest Management (IPM): Overlap and Conflicts, IRAC US Symposium Series No. 11. Entomological Society of America Annual Meeting, Minneapolis, MN, November 15-18, 2015. (abstract)

Inglis, D.A. and Gundersen, B. 2015. Impact of Potato virus Y on the quality of specialty potato tubers. Pg. 7-14 in Proceedings of the Washington-Oregon Potato Conference. January 27-29, Kennewick, WA. (abstract)

Karasev, A.V. 2015. A novel strain of Potato virus Y from tomato. 107th Annual Meeting of the American Phytopathological Society, August 3, 2015, Pasadena, CA (abstract)

Mallik, I. and Gudmestad, N.C. 2015. First report of Potato Mop Top virus causing potato tuber necrosis in Colorado and New Mexico. Plant Dis. 99:164.

Olsen, N. and A. Karasev. 2015. Going viral: discerning among common virus-induced diseases. Potato Grower Magazine 44(9):32. September 2015. http://www.potatogrower.com/2015/09/going-viral

Plaisance, A. and Yan, G. P. 2015. Comparison of two nematode extraction techniques. 2015. 54th Annual Meeting of the Society of Nematologists, East Lansing, MI, July 19-24, 2015. (abstract)

Robinson, A., Domfeh, O., and Gudmestad, N. C. 2015. Potato Tuber Viruses: Mop-Top Management.  ND Extension Circular A1777. 2pp. https://www.ag.ndsu.edu/publications/crops/potato-tuber-viruses-mop-top-management/a1777.pdf

Rowley, J.S., Gray, S.M., and Karasev, A.V. (2015) Screening potato cultivars for new sources of resistance to Potato virus Y. American Journal of Potato Research 92: 38-48. – Fig. 8 of this paper has been selected for the cover of the February issue of American Journal of Potato Research.

Rowley, J.S., Gray, S.M., and Karasev, A.V. 2015. Screening potato cultivars for new sources of resistance to Potato virus Y. American Journal of Potato Research 92: 38-48.

Weber, B. N., R. A. Witherell, and A. O. Charkowski. 2015. Low-cost potato tissue culture with microwave and bleach media preparation and sterilization. American Journal of Potato Research 92:128-137.

Wohleb, C.H. (2015) Development and impact of a pest alert system for potato growers in the Columbia Basin of Washington. 8th International IPM Symposium.

Wohleb, C.H., T.D. Waters, E.M. D’Auria, and D.W. Crowder. (2015) WSU Potato Pest Alerts – Providing Regional Pest Information and IPM-based Recommendations to Aid Management Decisions. Abstracts of the Papers Presented at the 99th Annual Meeting of the Potato Association of America. Am. J. of Potato Res., 93(2).

Yan, G. P. and Gudmestad, N.C. 2015. Stubby root nematode as the virus vector of corky ringspot disease of potato. 54th Annual Meeting of the Society of Nematologists, East Lansing, MI, July 19-24, 2015. (abstract) 

2014

Chikh-Ali, M., Gray, S.M., and Karasev, A.V. (2014) A multiplex IC-RT-PCR assay distinguishes fourteen recombinant structures of Potato virus Y. Abstracts of the Annual Meeting of the Potato Association of America, July 27-31, 2014; Spokane, WA. American Journal of Potato Researc.h 92: 180.

Chikh-Ali, M., Gray, S.M., and Karasev, A.V. (2014) A multiplex RT-PCR assay for the detection and accurate identification of the complex strains and recombinants of Potato virus Y. Abstracts of the Annual Meeting of the Pacific Division of the American Phytopathological Society, July 9-11, 2014; Bozeman, MT. Phytopathology. 104: S3.180.

Chikh-Ali, M., Rowley, J.S., Kuhl, J.C., Gray, S.M., and Karasev, A.V. 2014. Evidence of a monogenic nature of the Nz gene conferring resistance against Potato virus Y strain Z (PVYZ) in potato. American Journal of Potato Research 91: 649-654.

Dahan, J., Thompson, B., Wenninger, E.J., Olsen, N., and Karasev, A.V. (2014) Monitoring prevalence of Liberibacter solanacearum and haplotypes of its insect vector Bactericera cockerelli in Idaho potato fields. Abstracts of the Annual Meeting of the Pacific Division of the American Phytopathological Society, July 9-11, 2014; Bozeman, MT. Phytopathology. 104: S3.180.

Dwyer, J. D. 2015. Aphid Populations in 2014. Spudlines, Volume 50 Number 3.

Fageria, M., X. Nie, A. Gallagher, and M. Singh. (2014) Mechanical Transmission of Potato Virus Y (PVY) Through Seed Cutting and Plant Wounding. American Journal of Potato Research. 92(1):143-147.

Groves, R.L., Frost. K.E. and Huseth, A.S.  2014.  Integrating grower-driven and publically held data for improved plant protection.  In Proceedings of the 2014 Joint Meeting of the American Phytopathological Society & The Mycological Society of America (APS-CPS 2014), Annual Meeting Abstracts, Phytopathology 104:S3. pp.159. (abstract)

Karasev, A.V. (2014) Potato virus Y: a new problem in potato. Abstracts of the European Association of Potato Research, Pathology Section Meeting, November 17-21, 2013, Jerusalem, Israel. Potato Research. 57: 164-165.

Karasev, A.V. (2014) Recombinant strains of Potato virus Y – a new problem in potato. Abstracts of the Annual Meeting of the Pacific Division of the American Phytopathological Society, July 9-11, 2014; Bozeman, MT. Phytopathology.104: S3.182.

Lin, Y.H., D.A. Johnson, and H.R. Pappu. (2014) Effect of Potato Virus S Infection on Late Blight Resistance in Potato. American Journal of Potato Research. 91(6):642-648.

Lin, Y.H., J.A. Abad, C.J. Maroon-Lango, K.L. Perry, and H.R. Pappu. (2014) Molecular characterization of domestic and exotic potato virus S isolates and a global analysis of genomic sequences. Achrives of Virology. 159(8):2115-2122.

Murphy, A.F., A. Moreno, A. Fereres, and S.I. Rondon. (2014) International endeavors in investigating Potato Virus Y trasnmission. Abstracts of the Annual Meeting of the Potato Association of America, July 27-31, 2014; Spokane, WA. American Journal of Potato Research. 92: 37.

Murphy, A.F., R. Cating, P.B. Hamm, and S.I. Rondon. (2014) Evaluating sources of aphid vectors and Potato Virus Y in eastern Oregon and Washington. Abstracts of the Annual Meeting of the Potato Association of America, July 27-31, 2014; Spokane, WA. American Journal of Potato Research 92: 64. 

Naveed, K., N. Mitter, A. Harper, A. Dhingra, and H.R. Pappu. (2014) Comparative analysis of virus-specific small RNA profiles of three biologically distinct strains of Potato virus Y in infected potato (Solanum tuberosum) cv. Russet Burbank. Virus Research. 191(1):153-160.

Nikolaeva, O.V. and Karasev, A.V. (2014) Antigenic structure of Potato virus Y. Abstracts of the European Association of Potato Research, Pathology Section Meeting, November 17-21, 2013, Jerusalem, Israel. Potato Research. 57: 165.

Quintero-Ferrer, A., Evans, K.J., and Karasev, A.V. (2014) Genetic diversity of the NE-11 strain of Potato virus Y. Abstracts of the Annual Meeting of the Pacific Division of the American Phytopathological Society, July 9-11, 2014; Bozeman, MT. Phytopathology. 104: S3.183.

Quintero-Ferrer, A., Robles-Hernandez, L., Gonzalez-Franco A.C., Kerlan, C., and Karasev, A.V. (2014) Molecular and biological characterization of a recombinant isolate of Potato virus Y from Mexico. Archives of Virology. 159: 1781-1785.

Ramesh, S.V., G. Raikhy, C.R. Brown, J.L. Whitworth, and H.R. Pappu. 2014. Complete genomic characterization of a potato mop-top virus isolate from the United States. Archives of virology 159:3427-3433. DOI 10.1007/s00705-014-2214-0

Shrestha, D., E.J. Wenninger, P.J.S. Hutchinson, J.L. Whitworth, S. Mondal, S.D. Eigenbrode, and N.A. Bosque-Perez. 2014. Interactions among potato genotypes, growth stages, virus strains, and inoculation methods in the potato virus y and green peach aphid pathosystem. Environmental Entomology 43:662-671.

Swisher, K.D., Sengoda, V.G., Dixon, J., Munyaneza, J.E., Murphy, A.F., Rondon, S.I., Thompson, B., Karasev, A.V., Wenninger, E.J., Olsen, N., and Crosslin, J.M. (2014) Assessing potato psyllid haplotypes in potato crops in the Pacific Northwestern United States. American Journal of Potato Research. 91: 485-491.

Tyler, D., B. MacKenzie, M.S. Fageria, X. Nie, and M. Singh. (2014) Effects of Crop Management Practices on Current Season Spread of Potato Virus Y. Plant Disease. 98(2):213-222.

Whitworth, J., R. Novy, J. Stark, S. Love, M. Thornton, B. Charlton, S. Yilma, N.R. Knowles, M. Pavek, X. Wang, and J. Pavek. 2014. Huckleberry Gold: A Specialty Market Potato Cultivar with Purple-Skin, Yellow-Flesh, High Tuber Antioxidants, and Resistance to Potato Cyst Nematode (H1) and Potato virus X (Nb and Rx1). Am. J. Potato Res 91:447-458.

2013

Chikh Ali, M., Karasev, A.V., Furutani, N., Taniguchi, M., Kano, Y., Sato, M., Natsuaki, T., and Maoka, T. (2013) Occurrence of Potato virus Y strain PVYNTN in foundation seed potatoes in Japan, and screening for symptoms in Japanese potato cultivars. Plant Pathology 62: 1157-1165.

Crosslin, J.M. (2013) PVY: an old enemy and a continuing challenge. Am. J. Pot. Res. 90:2-6.

Frost, K.E., Groves, R.L., and A.O. Charkowski. (2013) Integrated control of potato pathogens through seed potato certification and provision of clean seed potatoes. Plant Disease 97(10):1268-1280.

Gray, S., Whitworth, J., Xu, H., Singh, R., and Karasev, A. (2013) ST 01: The current state (2012) of Potato virus Y (PVY) affecting potato grown in North America. NAPPO Science and Technology Documents, August 2013. NAPPO: North American Plant Protection Organization.

Karasev, A.V. and Gray, S.M. (2013) Continuous and emerging challenges of Potato virus Y in potato. Annual Review of Phytopathology 51: 571-586.

Karasev, A.V. and Gray, S.M. (2013) Genetic diversity of Potato virus Y complex. American Journal of Potato Research 90: 7-13.

Nelson, W.R., V. G. Sengoda, A.O. Alfaro-Fernandez, M.I. Font, J.M. Crosslin and J.E. Munyaneza. (2013) A new haplotype of Candidatus Liberibacter solanacearum identified in the Mediterranean region. Eur. J. Plant Path. 135:633-639.

Quintero-Ferrer, A. and Karasev, A.V. (2013) First report of Potato virus Y in potato in Jalisco, Mexico. Plant Disease 97: 430-430.

Whitworth, J.L. and J.M. Crosslin. (2013) Detection of Potato mop top virus (Furovirus) on potato in southeast Idaho. Plant Dis. 97:149.

Wohleb, C.H. (2013) A Sampling Network for Insect Pests of Potato in the Columbia Basin of Washington and “Potato Pest Alerts”. 2013 American Society for Horticultural Science Annual Conference. HortScience 48(9):S136. 

Wohleb, C.H. (2013) Development and impact of a sampling network and pest alert system for potato growers in the Columbia Basin of Washington. Abstracts of the Papers Presented at the 97th Annual Meeting of the Potato Association of America. Am. J. of Potato Res. 91(1):73. 

2012

Alabi, O.J., J.M. Crosslin, N. Saidov, and R.A. Naidu. (2012) First report of Potato virus Y in potato in Tajikistan. Plant Dis. 96:1074.

Buchman, JL, TW Fisher, VG Sengoda, and JE Munyaneza. (2012) Zebra chip progression: from inoculation to potato plants with liberibacter to development of disease symptoms in tubers. American Journal of Potato Research 89: 159-168.

Crosslin, J.M., N. Olsen, and P. Nolte. (2012) First report of zebra chip disease and "Candidatus Liberibacter solanacearum" on potatoes in Idaho. Plant Dis. 96:453.

Crosslin, J.M., P.B. Hamm, J.E. Eggers, S.I. Rondon, V.G. Sengoda, and J.E. Munyaneza. (2012) First report of zebra chip disease and "Candidatus Liberibacter solanacearum" on potatoes in Oregon and Washington State. Plant Dis. 96:452.

Crosslin, J.M., S.I. Rondon, and P.B. Hamm. (2012) Population dynamics of the beet leafhopper in northeastern Oregon and incidence of the beet leafhopper-transmitted virescence agent phytoplasma. Am. J. Pot. Res. 89:82-88.

Galvino-Costa, S.B., Figueira, A., Camargos, V.V., Geraldino, P.S., Hu, X., Nikolaeva, O.V., Kerlan, C., and Karasev, A.V. (2012) A novel type of Potato virus Y recombinant genome, determined for the genetic strain PVYE. Plant Pathology 61: 388-398.

Galvino-Costa, S.B.F., Figueira, A.R., Rabelo-Filho, F.A.C., Moraes, F. H. R., Nikolaeva, O.V., and Karasev, A.V. (2012) Molecular typing of Potato virus Y isolates from Brazil reveals a diverse set of recombinant strains. Plant Disease 96: 1451-1458.

Goolsby, J.A., J. Adamczyk, J.M. Crosslin, N. Troxclair, J. Anciso, G. Bester, J. Bradshaw, E. Bynum, L. Carpio, D. Henne, A. Joshi, J.E. Munyaneza, P. Porter, P. Sloderbeck, J. Supak, C. Rush, F.J. Willett, F. Workneh, B. Zechmann, and B. Zens. (2012) Seasonal population dynamics of the potato psyllid (Hemiptera: Triozidae) and its associated pathogen Candidatus Liberibacter solanacearum in potatoes in the southern Great Plains of North America. J. Econ. Entomol. 105:1268-1276.

Mallik, I., Anderson, N.R., and Gudmestad, N.C. 2012. Detection and differentiation of Potato virus Y strains from potato using immunocapture multiplex RT-PCR. Am. J. PotatoRes. 89:184-191.

Nikolaeva, O.V., Roop, D., Galvino-Costa, S.F.B., Figueira, A.R., Gray, S.M., and Karasev, A.V. (2012) Epitope mapping for monoclonal antibodies recognizing tuber necrotic strains of Potato virus Y. American Journal of Potato Research 89: 121-128.

Rondon, S., A. Schreiber, A., Jensen, P. Hamm, J. Munyaneza, P. Nolte, N. Olsen, E. Wenninger, D. Henne, C. Wohleb, and T. Waters. 2012. Biology, ecology and management of the potato psyllid vector of zebra chip disease in the Pacific Northwest. PNW 633.

Swisher, K.D., J.E. Munyaneza, and J.M. Crosslin. (2012) High resolution melting analysis of the cytochrome oxidase I gene identifies three haplotypes of the potato psyllid in the United States. Environ. Entomol. 41:1019-1028.

Wohleb, C.H., A. Jensen, and T.D. Waters. (2012) A regional sampling network for insect pests of potato in the Columbia Basin of WA. Proceedings of the 7th International IPM Symposium, pp. 104.

2011

Buchman JL, Heilman BE & Munyaneza JE. (2011) Effects of Bactericera cockerelli (Hemiptera: Triozidae) density on zebra chip potato disease incidence, potato yield, and tuber processing quality. Journal of Economic Entomology 104: 1783-1792.

Buchman JL, Sengoda VG & Munyaneza JE. (2011) Vector transmission efficiency of liberibacter by Bactericera cockerelli (Hemiptera: Triozidae) in zebra chip potato disease: effects of psyllid life stage and inoculation access period. Journal of Economic Entomology 104: 1486-1495.

Cavatorta, J., Perez, K., Gray, S., Van Ek, J., Yeam, I., and Jahn, M. (2011) Engineering virus resistance using a modified potato gene. Plant Biotech. J. 9:1014-1021.

Cilia, M., C. Tamborindeguy, T. Fish, K. Howe, T. W. Thannhauser, and S. Gray, (2011) Genetics Coupled to Quantitative Intact Proteomics Links Heritable Aphid and Endosymbiont Protein Expression to Circulative Polerovirus Transmission. J. Virol., 85: 2148 - 2166.

Cilia, M., Howe, K., Fish, T., Smith, D., Mahoney, J., Tamborindeguy, C., Burd, J., Thannhauser, T., and Gray, S. M. (2011) Biomarker discovery from the top down: Protein biomarkers for efficient virus transmission by insects (Homoptera: Aphididae) discovered by coupling genetics and 2-D DIGE. Proteomics 11:2440-2458.

Crosslin, J.M. (2011) First report of Potato mop-top virus on potatoes in Washington State. Plant Dis. 95:1483.

Crosslin, J.M., and L.L. Hamlin. (2011) Standardized RT-PCR conditions for detection and identification of eleven viruses of potato and Potato spindle tuber viroid. Am. J. Pot. Res. 88:333-338.

Crosslin, J.M., H. Lin, and J.E. Munyaneza. (2011) Detection of 'Candidatus Liberibacter solanacearum' in potato psyllids, Bactericera cockerelli Sulc, by conventional and real-time PCR. Southwest. Entomol. 36:125-135.

Crosslin, J.M., L.L. Hamlin, J.L. Buchman, and J.E. Munyaneza. (2011) Transmission of potato purple top phytoplasma to potato tubers and daughter plants. Am. J. Pot. Res. 88:339-345.

Ibolya, E., Z. Acs, J.E. Munyaneza, J.M. Crosslin, and M. Kolber. (2011) Survey and molecular detection of phytoplasmas associated with potato in Romania and Southern Russia. European Journal of Plant Pathology 130: 367-377.

Ju, H.J., Van Eck, J., and Gray, S.M. (2011) Factors influencing plant regeneration from seedling explants of Hairy Nightshade (Solanum sarrachoides). Plant Cell Tiss Organ Cult. 108:121-128.

Karasev, A.V., Hu, X., Brown, C.J., Kerlan, C., Nikolaeva, O.V., Crosslin, J.M., and Gray, S.M. (2011) Genetic diversity of the ordinary strain of Potato virus Y (PVY) and origin of recombinant PVY strains.
Phytopathology 101: 778-785.

Kerlan, C., Nikolaeva, O., Hu, X., Meacham, T., Gray, S., and Karasev, A. (2011) Identification of the molecular make-up of the Potato virus Y strain PVYZ. Phytopathology 101:1052-1060.

Lacey, L.A., T.X. Liu, J.L. Buchman, J.E. Munyaneza, J.A. Goolsby, and D.R. Horton. (2011) Entomopathogenic Fungi (Hypocreales) for Control of Potato Psyllid, Bactericera cockerelli (`ulc) (Hemiptera: Triozidae) in an Area Endemic for Zebra Chip Disease of Potato. Biological Control 56: 271-278.

Liu Q, C Jianchi, J.E. Munyaneza, and E.L. Civerolo. (2011) Endophytic bacterial in potato tubers affected by zebra chip disease. American Phytopathological Society 101: S108.

McCue KF, Ponciano GP, Rockhold DR, Whitworth JL, Gray SM, Fofanov Y, Belknap WR. (2011) Generation of PVY coat protein siRNAs in transgenic potatoes resistant to PVY. Amer J Potato Res. 89:374-383.

Mello, A.F.S., Olarte, R.A., Gray, S.M., and Perry, K.L. (2011) Transmission efficiency of Potato virus Y strains PVYO and PVYN-Wi by five aphid species. Plant Dis. 95:1279-1283.

Munyaneza JE, Buchman JL, Sengoda VG, Fisher, TW & Pearson CC. (2011) Susceptibility of selected potato varieties to zebra chip potato disease. American Journal of Potato Research 88: 435-440.

Munyaneza JE, Sengoda VG, Buchman JL & Fisher TW. (2012) Effects of temperature on 'Candidatus Liberibacter solanacearum' and zebra chip potato disease symptom development. Plant Disease 96: 18-23.

Munyaneza, J.E., A. Lemmetty, A.I. Nissinen, V.G. Sengoda, and T.W. Fisher. (2011) Molecular detection of aster yellows phytoplasma and 'Candidatus Liberibacter solanacearum' in carrots affected by the psyllid Trioza apicalis (Hemiptera: Triozidae) in Finland. Journal of Plant Pathology 93: 697-700.

Peng, L., J.T. Trumble, J.E. Munyaneza, and T.X. Liu. (2011) Repellency of a kaolin particle film to potato psyllid, Bactericera cockerelli (Hemiptera: Psyllidae) on tomato under laboratory and field conditions. Pest management Science 67: 815-824.

Podcasts

Duellman, K. 2019. The Potato Podcast 12: Aphid Monitoring. The Potato Podcast by Potato Country Magazine. April 16, 2019. https://potatocountry.com/2019/04/16/the-potato-podcast-episode-12-aphid-monitoring/

Videos

Potato Virus Y. University of Maine Cooperative Extension, https://youtu.be/ZX0r0GqcYsE

Webpages

Gray, S. Charkowski, A., Groves, R., Hutchinson, P., Karasev, A., McIntosh, C., Nolte, P., Whitworth, J. Updated Yearly. Management of potato tuber necrotic viruses. Last updated November 2019 https://blogs.cornell.edu/potatovirus/

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